Is a unique lighting installation that had been created for the annual Maggies London Night Hike which took place on September. A company created the interactive light installation at Horse Guards Parade, using colour change luminaries to up light the architecture of the long archway leading through to the courtyard. The luminaries were connected to a control system and microphone, and programmed to react and change according to the noises made by the hikers as they passed through the tunnel. In addition, the courtyard was filled with hundreds of white helium balloons each illuminated with a single LED. Hikers were encouraged to write messages on the balloons which were then released at the end of the walk.